Crow’s feet are small wrinkles that appear around the eye. They typically start small, slowly expanding and deepening with time, and they tend to be the first wrinkles to appear on the face. As you might imagine from the name, crow’s feet can look sort of like the foot of a many-toed crow planted on the corner of the eye. A number of products and services can be found for people who want to reduce their crow’s feet, and most dermatologists recommend a number of techniques for preventing the formation of crow's feet in the first place.
The primary cause for crows' feet is repetitive squinting. As facial muscles cause the tissue to fold, lines become 'etched' in the skin. Like other facial lines, crow's feet may be partly caused by sun damage and other environmental factors